Blind-hinge



(No Model.)

J. H. SHULL.

BLIND HINGE.

Patented Dec. 22, 1896.

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' UNITED STATES PATENT OFFICE.

JOHN H. SHULL, OF BOSTON, MASSACHUSETTS, ASSIGNOR OF ONE-HALF TO FRANK IV. STEVENS, OF NEWTON, MASSACHUSETTS.

BLIND-HINGE.

SPECIFICATION forming part of Letters Patent No. 573,544, dated December 22, 1896. Application filed March 20, 1896. Serial No. 584,091. (No model.)

To all whom, it may concern.-

Be it known that I, JOHN H. SHULL, of Boston, in the county of Suifolk and State of Massachusetts, have invented certain new and useful Improvements in Blind-Hinges, of which the following, taken in connection with the accompanying drawings, is a specification.

My invention relates to blind-hinges; and

it consists in certain novel features of construction, arrangement, and combination of parts which will be readily understood by reference to the description of the accompanying drawings and to the claims hereto appended I 5 and in which my invention is clearly pointed out.

Figure 1 of the drawings is an elevation of a portion of a blind and the casing of a window-frame with my improved hinges applied thereto and showing the blind in closed position. Fig. 2 is an elevation of the same parts with the blind in wide-open position and showing the upper portion of the lower hinge partially in section. Fig. 3 is a plan of the lower section of the lower hinge. Fig. 4 is a side elevation of the same. Figs. 5 and 6 are respectively a side elevation and an inverted plan of the upper section of the lower hinge. Figs. 7 and 8 are respectively a plan and a 0 side elevation of the lower section of the upper hinge, and Fig. 9 is a plan of the upper section of the upper hinge.

In the drawings, A is the casing of a window-frame.

3 5 B is the hinge-stile of a window-blind; G,

the blind-slats; D, the lower section of the upper hinge screwed to the casing A.

E is the upper section of the upper hinge screwed to the blind-stile.

F is the lower section of the lower hinge screwed to the window-casing, and G is the upper section of the lower hinge, having two flanges at right angles to each other which are firmly secured to the blind-stile by suitable screws, as shown.

The section F of the lower hinge is provided with the upwardly-projecting pintle a and with the cam-like plate or disk b, in which is formed the tapering slot 0, extending from its outer edge inward or toward the center of the window when secured in position upon the window-casing, with its center line substan tially parallel to the outer face of said casing. The section G of said lower hinge has formed in its under side the slot d to receive the pintle 5 5 a, and also has formed thereon the tapered lug or blunt wedge 6, so arranged and constructed that when the blind is swung open and into a position parallel with the wall of the building said lug or wedge will be made to engage the tapering slot 0 and lock the blind in said open position.

In moving the blind from its closed position to its wide-open position the edge of the cam-plate 1) acts upon one end of the tapered lug orwedge e to gradually swing the blind into a position inclined to a perpendicular in the direction of the width of the blind, said blind swinging about the upper hinge as a pivot, as indicated in dotted lines in Fig. 1, 0 until the end of said lug or wedge passes off the cam b at the opening of the slot 0, when the force of gravity, acting upon said blind, causes it to assume a perpendicular position, thereby forcing the lug or wedge e into the slot 0, which is designed-to bear upon the walls of the slot 0 at the points 2 and 3 on opposite sides thereof and thereby cause the wall of the slot cl in the hinge-section G to press hard against the pintle a at 4;, thus giv- 8o ing a looking-bearing to hold the blind in its open position of a length equal to the distance from 2 to 4, as indicated on Fig. 3.

To close the blind when in an open position and looked as above described, it is not necessary to lift the blind to disengage the lug or wedge from the slot. On the contrary, provision is made, as will be hereinafter explained, to make it impossible to lift the blind at that point, but all that is necessary 0 is to press against the inner edge of the blind at its lower end to move it into the position indicated by the dotted lines in Fig. 1 and then swing the blind to close it. This can be done without the person operating the blind 5 being obliged to put his or her head out of the window.

The section D of the upper hinge is provided with the upwardly-projecting cylindrical pintle f, provided at its outer side with [O3 the laterally-projecting lug f, as shown in Figs. 1, 2, '7, and S.

The section E of the upper hinge is provided with an opening through its horizontal arm g, comprising a circular hole g,'of size to fit the circular portion of the pintle f with a slot h at one side thereof to permit the passage of the lug f when it is desired to remove or rehang the blind; but this can only be done when the blind is in a particu lar position, which, in the case illustrated, is when the blind is a little more than half-way open. In all other positions of the blind the lug f will etfectually prevent the blind being lifted, because said lug projects over the upper surface of the horizontal arm of said hinge-section E.

The arm g of the hinge-section E has formed thereon the upWardly-projecting lug i, which,

' when the blind is wide open and firmly locked by the engagement of the wedge 6 with the slot 0, is forced into contact with the lug f with such force as to take up any slack or looseness of fit between the pintle f and hole g in the arm g, which, together with the wedging action of the locking devices of the lower hinge, will effectuallyprevent all rattle of the blind when locked in open position.

The slot (1 does not extend through the horizontal arm of the hinge-section G, so that the pintle a is at all times covered and protected from the weather by said horizontal arm.

\Vhen the blind is opened, the lug i on the section E of the upper hinge comes in contact with the lug f on the pintle f just as the end of the lug or wedge 6 passes off the cam b, and as the wedge e is forced into the slot 0 the lower outer corner of the blind is forced slightly nearer to the wall of the building than the outer upper corner, thereby tending to slightly twist the blind, so that when the blind is closed the upper end ofthe blind will come in contact slightly before the lower end, sothat when the lower end is pressed into contact with the casing and fastened the whole stile of the blind will be held firmly in contact with the case, so as to prevent any rattle of the blind when in closed position. lVhat I claim as new, and desire to secure by Letters Patent of the United States, is- 1. A blind-hinge one section of which is provided with a pintle about which the blind may be moved, a cam-plate to move said blind from a perpendicular position as it is moved froma closed to an open position, and a tapering slot formed in said plate and extending in the direction of the width of the blind; and the other section of which is provided with a shoulder to engage said cam, a

tapered lug or wedge to engage said tapering I pintle and extending in the direction of the width of the blind.

2. In combination with a hinge for the lower end of a blind comprising the section F having the cam-plate b the pintle Ct and the tapering slot 0, and the section G provided with the lug e and slot cl; an upper hinge comprising the section D provided with the pintle f having the lug f, and the section E having the opening g h and the lug 1'.

In testimony whereof I have signed my name to this specification, in the presence of two subscribing witnesses, on this 18th day of March, A. D. 1896.

JOHN H. SHULL.

\Vitnesses:

N. O. LOMBARD, L. C. GREENLEAF. 

